Ключевые слова: adjustable knobs, antenna, audio equipment, broadcast, communication device, communication technology, connectivity, digital audio, digital communication, effective communication, electronics, emergency communication, event coordination, events management, function buttons, gadget, handheld device, instant messaging, lightweight, location services, noise reduction, outdoor activities, portable device, professional equipment, public safety, radio frequency, reliability, reliable communication, robust, safety, signal transmission, sound clarity, team communication, team coordination, technology, user controls, walkietalkie, wireless device,